Abstract
Eight degrees of freedom vehicle model was established. Using the method of fuzzy control, the ABS control algorithm was designed based on slip ratio. Simulation analysis was done at speed of 15m/s, 20m/s, 25m/s under turning braking. The results show that the vehicle braking performance and vehicle stability at middle or low speed was improved by using the ABS controller, but qualitative analysis shows that phenomenon of vehicle instability was appeared at high-speed conditions. The turning braking stability under ABS controller was judged quantificationally by the stability judging formula. The results show that the requirements of stability control could not meet with only Anti-lock Braking System.
Highlights
The establishment of dynamic modelTo better describe the dynamic characteristics of the vehicle, a four-wheel 8 DOFs vehicle dynamics model was established as shown in Figure 1, including the rotation of four wheels as well as yaw, roll, lateral and longitudinal movements of car body
Eight degrees of freedom vehicle model was established
The results show that the designed anti-lock braking systems (ABS) control system can effectively improve the braking performance
Summary
To better describe the dynamic characteristics of the vehicle, a four-wheel 8 DOFs vehicle dynamics model was established as shown in Figure 1, including the rotation of four wheels as well as yaw, roll, lateral and longitudinal movements of car body.
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